1. actually as of today by the changing of climate and increasing of population at urban areas to adopt the techniques of drainage system to prevent flooding during rainy season or to control and minimized the flood and sewage system today fastest growing population specially in an urban area it treated like TSE to convert it to irrigation and it is useful specially in middle east country dont have a source of water supply like river or lake to supply and sustain/ maintain the irrigation system purposes it will treated and supply for all landscaping and farm area without using chemical fertilizer and using a sub fertilizer to prevent soil toxic.
